Ensuring the availability of adequate seed supplies of species and sources appropriate for restoration projects and programs necessitates extensive science-based planning. The selection of target species requires a review of disturbance conditions and reference areas, development of a reference model, and consideration of specific objectives, timeframes, available resources, and budgets as well as the performance of prospective species in past restoration efforts. Identification of seed sources adapted to site conditions is critical to provide for short-term establishment and long-term sustainability. Seed zones and plant movement guidelines provide tools for sourcing plant materials with reduced risk of maladaptation. A seed zone framework also facilitates seed use planning and contributes to stability and predictability of the commercial market, thereby reducing costs and improving the availability of adapted seed supplies. Calculating the amount of seed required for each species is based on seed quality (viability, purity), seed weight, expected seedling establishment, and desired composition of the seeding. If adequate collections from wildland stands are not feasible, then seed increase in seed fields or use of nursery stock may be warranted. Adherence to seed collection and seed production protocols for conserving genetic diversity is critical to protect genetic resources and buffer new seedings and plantings against environmental stressors. Maintenance of genetic diversity becomes even more critical considering current or expected climate change impacts. Collaboration and partnerships can benefit seed selection and procurement programs through sharing of information, coordination in project planning, and increasing the availability of native seed.

中文翻译：

---

种子计划、采购和采购

确保适合恢复项目和计划的物种和来源的充足种子供应的可用性需要广泛的基于科学的规划。目标物种的选择需要审查干扰条件和参考区域，开发参考模型，并考虑特定目标、时间框架、可用资源和预算以及预期物种在过去恢复工作中的表现。确定适合现场条件的种子来源对于提供短期定植和长期可持续性至关重要。种子区和植物移动指南为采购植物材料提供了工具，降低了适应不良的风险。种子区框架还有助于种子使用规划并有助于商业市场的稳定性和可预测性，从而降低成本并提高适应性种子供应的可用性。计算每个物种所需的种子量是基于种子质量（活力、纯度）、种子重量、预期的幼苗建立和所需的种子组成。如果无法从荒地林分进行足够的收集，则可能需要增加种子田的种子或使用苗木。遵守保护遗传多样性的种子收集和种子生产协议对于保护遗传资源和缓冲新的种子和种植免受环境压力因素至关重要。考虑到当前或预期的气候变化影响，维持遗传多样性变得更加重要。合作和伙伴关系可以通过信息共享使种子选择和采购计划受益，